Not sure if this submitted correctly the first time. I tried adding a new plugin to eclipse, but got the following error. does anyone know what is wrong?

An error occurred while collecting items to be installed
session context was:(profile=epp.package.cpp, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,org.eclipse.egit,3.7.0.201502260915-r
No repository found containing: osgi.bundle,org.eclipse.egit.core,3.7.0.201502260915-r
No repository found containing: osgi.bundle,org.eclipse.egit.doc,3.7.0.201502260915-r
No repository found containing: osgi.bundle,org.eclipse.egit.ui,3.7.0.201502260915-r
No repository found containing: osgi.bundle,org.eclipse.jgit,3.7.0.201502260915-r
No repository found containing: osgi.bundle,org.eclipse.jgit.archive,3.7.0.201502260915-r
No repository found containing: org.eclipse.update.feature,org.eclipse.egit,3.7.0.201502260915-r
No repository found containing: org.eclipse.update.feature,org.eclipse.jgit,3.7.0.201502260915-r
No repository found containing: osgi.bundle,org.eclipse.jgit.java7,3.7.0.201502260915-r
No repository found containing: org.eclipse.update.feature,org.eclipse.jgit.java7,3.7.0.201502260915-r
No repository found containing: osgi.bundle,org.slf4j.impl.log4j12,1.7.2.v20131105-2200